twitchverb definition in Position and movement topic from the Oxford Advanced Learner's Dictionary

twitch

verb: Position and movement topic

[intransitive,transitive]twitch (something)if a part of your body twitches, or if you twitch it, it makes a sudden quick movement, sometimes one that you cannot controlHer lips twitched with amusement.The cats watched each other, their tails twitching.The animal lay on the ground, its whole body twitching and jerking.